ماژول کنترل سروو موتور با آی سی PCA9685

PCA9685 16 Channels PWM I2C 12-Bit
The PCA9685 16 Channel PWM I2C 12-Bit is a pulse width modulation (PWM) controller that communicates over the I2C protocol and is capable of controlling up to 16 individual PWM outputs.
Each PWM output can provide a 12-bit PWM signal.
This device is commonly used in applications where precise control of multiple PWM channels is required, such as in the control of LED lights, motors, servo motors, and other applications where intensity, speed, or position need to be varied.
SPECIFICATIONS AND FEATURES
Controller: PCA9685
Supply voltage: 5V DC
Maximum current per pin: 25 mA
Interface: I2C
Resolution: 12 bits
Number of channels: 16
Operating frequency: 40 Hz to 1000 Hz
Protection: Voltage Reversal
Dimensions: 62mm x 26mm
Weight: 12g

Datasheet
PCA9685
Servo Driver

Pinout

Description of the Pins
Power pins
GND  : This is the power and signal ground pin, it must be connected
VCC  – This is the logic power pin  (3V to 5V) , connect it to the logic level you want to use for the PCA9685 output.
V+ – This is an optional  power pin   that will supply distributed power to the servos. If you are not using the servos, you can leave it disconnected. It is not used at all by the chip. You can also inject power from the top of the board on pin number 2. You need to provide 5V/6V DC if you are using servos. If you need to, you can go up to 12V DC, but if you mess up and connect VCC to V+,  YOU COULD  DAMAGE THE BOARD.
Control pins
SCL – I2C Clock Pin, connect this to the clock line of your I2C microcontroller.
SDA : I2C data pin, connect it to the data line of your I2C microcontroller.
OE  – Output Enable. This can be used to quickly disable all outputs. When this pin is  low ,  all pins are  enabled  . When the pin is  high,  the outputs are  disabled . This is an optional pin.
Ports of departure
There are 16 output ports. Each port has 3 pins: V+, GND, and PWM.  Each PWM runs independently, but  they all need to have the same PWM frequency. I.e. for LEDs you probably want 1.0 KHz but servos need 60 Hz, so you can’t use half for LEDs at 1.0 KHz and half at 60 Hz. The maximum current per pin is 25 mA.
There are 220 ohm resistors inside the board in series with all the PWM pins and the output logic is the same as VCC,   so keep this in mind if using LEDs.
PWM duty cycle
For example; the ON time of each LED driver output and the PWM duty cycle can be controlled independently using the LEDn_ON  and  LEDn_OFF registers , if you set the LEDn_ON time to 409 and for LEDn_OFF to 1128, the duty cycle will be: